YouTubeDataAPI.js

var YouTubeDataAPI = Backbone.Model.extend({
    
    sendV2ApiRequest: function(options) {

        return $.ajax({
            url: options.url,
            data: $.extend({}, options.data, {
                //  The v parameter specifies the version of the API that YouTube should use to handle the API request.
                v: 2,
                //  The alt parameter specifies the format of the feed to be returned.
                alt: 'json',
                //  If you want YouTube to reject API requests that contain invalid parameters, set the strict parameter value to true
                strict: true
            }),
            //  A developer key uniquely identifies a product that is submitting an API request.
            //  https://developers.google.com/youtube/2.0/developers_guide_protocol#Developer_Key
            headers: {
                'X-GData-Key': 'key=[KEY]'
            },
            success: function() {
                if (options.success) {
                    options.success(arguments[0]);
                }
            },
            error: function(error) {
                //  Manually aborted events don't need to be reported on
                if (error.statusText !== 'abort') {
                    console.error(error);
                }
                
                if (options.error) {
                    options.error(arguments[0]);
                }
                
            }
        });
    },
    
    getPlaylistTitle: function (playlistId, callback) {

        return this.sendV2ApiRequest({
            url: 'https://gdata.youtube.com/feeds/api/playlists/' + playlistId,
            data: {
                fields: 'title'
            },
            success: function (result) {
                if (callback) {
                    callback(result.feed.title.$t);
                }
            }
        });
    }
});